18555480 has 192 divisors, whose sum is σ = 66044160. Its totient is φ = 4675968.

The previous prime is 18555469. The next prime is 18555487. The reversal of 18555480 is 8455581.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18555487) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 223519 + ... + 223601.

It is an arithmetic number, because the mean of its divisors is an integer number (343980).

Almost surely, 2^18555480 is an apocalyptic number.

18555480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18555480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33022080).

18555480 is an abundant number, since it is smaller than the sum of its proper divisors (47488680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18555480 is a wasteful number, since it uses less digits than its factorization.

18555480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 18555480 is about 4307.6072244345. The cubic root of 18555480 is about 264.7427431021.

The spelling of 18555480 in words is "eighteen million, five hundred fifty-five thousand, four hundred eighty".